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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Information Water-quality 1982-11-30 1996-08-09
Inorganics, Major, Metals Water-quality 1976-05-17 1996-08-09
Inorganics, Major, Non-metals Water-quality 1976-05-17 1996-08-09
Inorganics, Minor, Non-metals Water-quality 1982-11-30 1982-11-30
Inorganics, Minor, metals Water-quality 1976-05-17 1996-08-09
Nutrient Water-quality 1976-05-17 1996-08-09
Organics, other Water-quality 1976-05-17 1996-08-09
Organics, pesticide Water-quality 1989-11-13 1996-08-09
Physical Daily Values, Groundwater Levels, Unit Values, Water-quality 1976-04-15 2024-11-22
n/a USGS Active Groundwater Level Network Site 1976-01-01 2021-01-01
n/a USGS Annual Water Data Reports Site 2005-01-01 2024-01-01
Water Data for the Nation inventory

Monitoring location 404757073440401 is associated with a Well in Nassau County, New York. Current conditions of Groundwater level above NGVD 1929 are available. Water data back to 1976 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
404757073440401 n/a
Site name
N 9099. 1 n/a
Site type
Well
GW
DMS latitude 404758.5 n/a
DMS longitude 0734403.5 n/a
Decimal latitude 40.7995833 n/a
Decimal longitude -73.7343056 n/a
Latitude-longitude method
Interpolated from Digital MAP. N
Latitude-longitude accuracy
Accurate to + or - .1 sec (Differentially-Corrected GPS). 1
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
New York 36
State
New York 36
County
Nassau County 059
Country US n/a
Land net location description n/a
Name of location map SEA CLIFF, NY n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 60.0 feet n/a
Method altitude determined Level or other surveyed method. L
Altitude accuracy 0.1 feet n/a
Altitude datum
National Geodetic Vertical Datum of 1929 NGVD29
Subbasin hydrologic unit
Northern Long Island 02030201
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site YNNYNNNNNNNNNNNNYNNNNNNNNNNNNN n/a
Date of first construction
19760218 n/a
Date site established or inventoried n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation EST n/a
Site honors Daylight Saving Time
N n/a
Data reliability
Minimal data. M
Data-other GW files YYNNNYNN n/a
National aquifer Northern Atlantic Coastal Plain aquifer system S100NATLCP
Local aquifer Glacial Aquifer, Upper 112GLCLU
Local aquifer type
Unconfined single aquifer U
Well depth 71. feet n/a
Hole depth
n/a
Source of depth data n/a
Project number n/a

Operated in cooperation with:

logo for Nassau County Office of Emergency Management
Nassau County Office of Emergency Management
logo for USGS - Cooperative Matching Funds
USGS - Cooperative Matching Funds